. >> reporter: it's being called the city of broken glass. more than 24,000 people working to clean the damage from the chelyabinsk region. the explosion blew out windows from more than 4,000 buildings and 1200 people sustained injuries most caused by flying glass. >> i told the students to move from the windows and not long after that the meteor explode. they were all fine, but when they got back to their seats the piece of glass threw over their head. >> reporter: nasa estimates the meteor to have been 55' across and weighing 10 tons the same as a school bus, but smaller than the unrelated asteroid that flew by earth a few hours later. it created a dangerous situation with midday temperatures around 10 degrees fahrenheit. some are heading out to a frozen lake to look for meteor fragments. >> i noticed it went down this way and thought an asteroid is flying. here it shattered. i better pay attention to where it falls and go and explore them. >> reporter: the region's govern estimates the damage to be in the neighborhood of $33 million, but p